Lock and latch



A. MNESGH LOCK AND LATCH Filed May 21. 1925 E ShGW'W-Sheet l l?? H j www@ LM/Ww@ zu WITNESS: ATTO EY INVENTOR wn H, RWM., jm@

A A. MNESCH LOCK AND LATCH Filed May 21, 1926 2 Shwm-hee't 2 lill ./MDLFH lllhlESCH, 0F RULE, TEXAS.

LUGK AND LATCH.

Application tiled May 21, 1926. Serial No. 110,793.

rFhis invention relates to a lock, `the general object of the `invention being to provide a simple lock for use `on barn doors, garages and the like where `the loch is manipulated from the exterior ofthe building so that knobs are not necessary.

`'lhis invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claim.

ln describing my invent-i011 in detail, reference Will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in Which:-

Figure l is an elevation of a portion of a door and its frame showing the invention in use.

Figure 2 is a view of the lock With the cover removed and the bolt projected.

Figure 8 is a similar View but showing the bolt retracted.

Figure Ll is a section on line l-/l of Figure 2.

Figure 5 is a section on line 55 of Figure 2.

Figure 6 is a View of the key operated member. A

Figure 7 is a view of the locking tumbler.

Figure 8 is a view of the bolt.

ln these vievvs l indicates the casing of the lock and 2 its cover, these parts being adapted to be fastened to a door or other barrier shown at A by the bolts 8, the nuts a of which are arranged on the inside of they door so that they cannot be taken off from the exterior of the building When the door is locked. A bolt 5 passes through the casing, with its ends projecting from each end thereof and this bolt is normally held in retracted position by a coiled spring 6 placed in an opening 7 formed in the bolt and having one end engaging an end Wallof said opening and its other end engaging a pin 8 which is carried by the casing and extends into said opening. This bolt has a pair of notches in its upper edge, as shovvn at 9 and lO. A locking tumbler ll is vertically movable in a guideWay l2 formed in the casing, the lower end of the guideway opening out through tl e bottom of the casing so that the tumbler can be raised by the linger of the hand of the operator. This tumbler Will, under the action of gravity, drop into one of the notches 9 Vor l() .as the bolt is moved to place either one of the notches in alignn'ient with tlhe tumbler, the tumbler having a notch 13 therein through which the bolt passes. in ln-shaped hey operated tumbler ll is vertically movable in a horizontal guideway l5 in the casing, oney end of this guideway being enlarged so that this end is of the same depth the guideway l2 and the arm lll Vof the tumbler ll engages this enlarged part of the guideway when the tumbler is retracted but will engage the upper end of the guidevvay l2 when the tumbler is projected. When in this latter position, the arm 14 Will engage the top of theI tumbler ll and thus prevent vertical movement of said tumbler ll and will hold said tumbler in engagement With one of the notches 9 or l0.

'lhe tumbler la is provided with a notch 16 for engagement by the Ward of a key placed in the keyhole 17 of the lock.

rlhe rear end of the bolt 5 forms a handle and by raising the tumbler ll by inserting the linger into the lower end of the guideyvay l2, the bolt can be pushed forwardly until one end thereof engages the keeper recess B in the frame B of "the door. As soon as the notch 9 comes under the upper part of the tumbler ll, said tumbler will drop into the notch and thus hold the bolt project-ed and With the spring (5 under tension. 'lhus the door will be locked, but it can be unlocked by simply pushing up the tumbler ll Which Will permit the spring (i to move t-he bolt to retracted position and the bolt Will be held in this posit-ion by the tumbler dropping into the notch l0. llf the door is to be locled to prevent entrance by a thief or other unauthorized person, after the bolt has been projected, as before explained, a liey is inserted in the keyhole 17 and turned to project the tumbler let so that its arm 14 will pass over the top of the tumbler 1l and thus prevent said tumbler ll from being pushed upwardly to release the bolt. 'lhen to unlock the door, it is necessary to insert the key and retract the tumbler ll; after Which the tumbler ll is raised to permit the spring to retract the bolt.

lit is thought from the foregoing description that the advantages and novel features of my invention Will be readily apparent.

l desire it to be understood that l vmay make changes in the construction and in the combination and arrangement of the several lill() parte provided that such changes fall Within the scope of the appended claim.

illhat l claim is A lock of the character described comprising a casing having a longitudinal passage formed therethrough, a bolt termed with an elongated opening and mounted for slidabie movement in the passage with its ends projeeting beyond the ends of the easing in a nian'ner whereby one end 'provides a handle, a pinsecnred to the casing and extending into he opening, a coil spring positioned in the opening and having its end convolntions eni iging the pin and one end et said opening Jior normally maintaining the bolt in a retraeted position7 said bolt being formed With spaced parallel notches, said casing having a vertically arranged slideway having its loW- weaves er end open, said slideway communicating with the longitudinal passage, a tumbler mounted in said Slideway and operable by placing a iinger in `eaid opening and adapted for engagement with either one of said notches to retain said bolt` in a projected or -retracted position, aid easing being provided With a horizontal guide-way. a substantially L-shaped locking tumbler provided With a notch and having one arni thereof mounted for slidable movement in said horizontal guide-\\'ay, and means engageable with Said locking tumbler and within the notch thereof for moving y@aid locking tumbler in the path oi the lirst mentioned tun'ibler for locking the latter in the notches ol" said bolt.

In testimony whereof I allix niv Signataire.

ADOLPH KNESCH. 

